Haloacylation of the Quintuple-Bonded Group VI Metal Amidinate Dimers and Disproportionation of Acyl Groups to Form Carbynes†
Han-Gung Chen
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
Search for more papers by this authorHsiang-Wen Hsueh
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
Search for more papers by this authorTing-Shen Kuo
Department of Chemistry, National Taiwan Normal University, Taipei 11677 (Taiwan)
Search for more papers by this authorCorresponding Author
Prof. Dr. Yi-Chou Tsai
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)Search for more papers by this authorHan-Gung Chen
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
Search for more papers by this authorHsiang-Wen Hsueh
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
Search for more papers by this authorTing-Shen Kuo
Department of Chemistry, National Taiwan Normal University, Taipei 11677 (Taiwan)
Search for more papers by this authorCorresponding Author
Prof. Dr. Yi-Chou Tsai
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)
Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013 (Taiwan)Search for more papers by this authorWe are grateful to the National Science Council, Taiwan for financial support under Grant NSC 99-2113-M-007-012-MY3. We also thank the Frontier Research Centre on Fundamental and Applied Sciences of Matters for financial support.
Graphical Abstract
Give me five: Group VI metal quintuple bonds undergo Friedel–Crafts-type haloacylation reactions. Treatment of the quintuple-bonded molybdenum complexes with one equivalent of acyl halides RCOX (R=Me, C6H5, 2-MeC6H4; X=Cl, Br), yields metal–metal quadruple-bonded acyl complexes. Subsequent treatment with a second equivalent of acyl halides causes disproportionation of two acyl groups to give dimolybdenum carbyne carboxylate complexes.
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